Add some tests for window.testState

Author: badeball

features/test_state.feature

@@ -0,0 +1,51 @@
+Feature: window.testState
+  Scenario: gherkin document
+    Given a file named "cypress/e2e/a.feature" with:
+      """
+      Feature: a feature name
+        Scenario: a scenario name
+          Given a step
+      """
+    And a file named "cypress/e2e/a.js" with:
+      """
+      const { Given } = require("@badeball/cypress-cucumber-preprocessor");
+      Given("a step", function() {
+        expect(testState.gherkinDocument.feature.name).to.equal("a feature name");
+      });
+      """
+    When I run cypress
+    Then it passes
+
+  Scenario: pickles
+    Given a file named "cypress/e2e/a.feature" with:
+      """
+      Feature: a feature name
+        Scenario: a scenario name
+          Given a step
+      """
+    And a file named "cypress/e2e/a.js" with:
+      """
+      const { Given } = require("@badeball/cypress-cucumber-preprocessor");
+      Given("a step", function() {
+        expect(testState.pickles[0].name).to.equal("a scenario name");
+      });
+      """
+    When I run cypress
+    Then it passes
+
+  Scenario: pickle
+    Given a file named "cypress/e2e/a.feature" with:
+      """
+      Feature: a feature name
+        Scenario: a scenario name
+          Given a step
+      """
+    And a file named "cypress/e2e/a.js" with:
+      """
+      const { Given } = require("@badeball/cypress-cucumber-preprocessor");
+      Given("a step", function() {
+        expect(testState.pickle.name).to.equal("a scenario name");
+      });
+      """
+    When I run cypress
+    Then it passes